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Product Detailed Parameters
- Description：IC MTR DRVR BIPOLR 3-5.5V 44PLCC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Motor Type - Stepper：Bipolar
- Motor Type - AC, DC：-
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (4)
- Interface：Logic
- Technology：DMOS
- Step Resolution：1, 1/2, 1/4, 1/8
- Applications：General Purpose
- Current - Output：2.5A
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：8V ~ 35V
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：44-LCC (J-Lead)
- Supplier Device Package：44-PLCC (16.59x16.59)
- Grade：-
- Qualification：-
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Overview
The A3977KEDTR-T is a bipolar stepper motor driver manufactured by Allegro Microsystems. It integrates a pulse distributor, DMOS power stage, and logic interface in a single IC. The device supports microstepping resolutions of 1, 1/2, 1/4, and 1/8 steps. It operates with a supply voltage range of 3V to 5.5V and drives loads between 8V and 35V. The maximum output current is 2.5A. It utilizes DMOS technology and features a 44-PLCC package with J-leads. The junction temperature range is -40°C to 150°C.
Feature Summary
- Integrates a complete microstepping motor driver with built-in pulse distribution
- Supports multiple resolution modes including full, half, quarter, and eighth steps
- Features DMOS technology for efficient power driving
- Includes integrated protection mechanisms for system reliability
Applications
- General purpose stepper motor control systems
- Industrial automation equipment
- Precision motion control applications
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix and packaging details match project requirements. Check for moisture sensitivity level compliance during storage and handling. Ensure the 44-PLCC footprint matches the PCB design. Validate that the discontinued status does not impact long-term production schedules.
Selection Notes
Select this component for applications requiring integrated pulse distribution without external controllers. Consider the 44-PLCC package constraints for board layout. Evaluate thermal management needs given the 150°C junction limit. Compare against newer packages like TSSOP if pin count or size is critical. Verify compatibility with the required 3V to 5.5V logic supply.
Part Context
This part belongs to the A3977 series of microstepping drivers from Allegro MicroSystems. It is designed for bipolar stepper motors and combines control logic with power output stages. The series is known for simplifying motor drive designs by eliminating complex sequencing circuits. This specific variant uses a plastic leaded chip carrier package.
Replacement Considerations
The A3977SLPTR-T is listed as a similar replacement option. Note that the SLPTR variant uses a TSSOP-28 package, which differs significantly in pin count and physical dimensions from the 44-PLCC package of the KEDTR model. Direct pin-to-pin substitution is not possible due to the package difference.
